The server implements a single tool 'get_problem' with a valid input schema and clear naming. The tool description is in Chinese but adequately explains the purpose (fetch Luogu problem details including statement, I/O format, samples, constraints). The input parameter 'problem_id' has a basic type (string) and description with examples of valid formats (P1001, B2002, CF1234A, AT_abc123_a). However, critical gaps exist: (1) No documented output schema is visible in the code, the response structure is not formally specified, forcing LLMs to infer what fields are returned; (2) Parameter description lacks formal constraints (regex pattern, length limits), it lists examples but does not declare what constitutes a valid ID format; (3) No error handling guidance is present, if an invalid problem_id is passed, the error response does not guide the LLM to retry with a corrected format or alternative recovery steps; (4) The tool operates as a read-only web scraper of a Chinese education platform, which carries risk of rate-limiting, blocking, or terms-of-service violation, but no rate-limit or timeout documentation exists. The naming convention (verb_noun: get_problem) is solid. The description is adequate in length (~150 chars in English translation) but could be strengthened by stating what format the problem_id must follow and what structure is returned.

• Document the output schema explicitly. Create a JSON example or TypeScript interface showing fields returned (e.g., { title, statement, inputFormat, outputFormat, samples: [{input, output}], constraints, source }). Include this in code comments or a README.
• Add a formal regex pattern to the problem_id parameter description or schema: e.g., 'problem_id: A string matching ^[A-Z]{1,3}\d{1,5}[A-Z]?$ or ^[A-Za-z]{2}_[a-z0-9]{1,10}$. Examples: P1001, B2002, CF1234A, AT_abc123_a.'
• Implement error recovery guidance in the mcp-client.js handler. When the fetch fails or parsing fails, return a structured error with a next_action hint: e.g., { error: 'Problem not found or parsing failed', problem_id: '<input>', suggestion: 'Verify the problem_id format matches P####, B####, CF####, or AT_abc_X patterns. Search for the problem on luogu.com.cn first.' }.
• Add timeout configuration and rate-limit detection. Document in README: 'Requests timeout after 10s. If you receive a rate-limit error, wait 60s before retrying. The server respects Luogu's robots.txt.'
• Translate parameter and tool descriptions to English or provide both languages. English descriptions improve LLM comprehension in multilingual deployments.
• Include pagination or result limits in the response (e.g., samples: [...max 3], problems_found: 1). This prevents unexpectedly large responses.